MNS or Large site

Hi there.
In your opinion what type of sites is good.
Micro niche site with 5 articles and keywords
or a site with 20-30 articles and 20-30 keywords
that are roughly similar themes.
I create multiple sites and then sell them.
What type of sites is good as you.
You know what you think.
Which sites are good and profitable.
I should be grateful to everyone who shared information or opinion.

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